1 files changed, 58 insertions, 0 deletions
diff --git a/test/Analysis/BranchProbabilityInfo/pr18705.ll b/test/Analysis/BranchProbabilityInfo/pr18705.ll
new file mode 100644
index 0000000..9f239b4
--- /dev/null
+++ b/test/Analysis/BranchProbabilityInfo/pr18705.ll
@@ -0,0 +1,58 @@
+; RUN: opt < %s -analyze -branch-prob | FileCheck %s
+
+; Since neither of while.body's out-edges is an exit or a back edge,
+; calcLoopBranchHeuristics should return early without setting the weights.
+; calcFloatingPointHeuristics, which is run later, sets the weights.
+;
+; CHECK: edge while.body -> if.then probability is 20 / 32 = 62.5%
+; CHECK: edge while.body -> if.else probability is 12 / 32 = 37.5%
+
+define void @foo1(i32 %n, i32* nocapture %b, i32* nocapture %c, i32* nocapture %d, float* nocapture readonly %f0, float* nocapture readonly %f1) {
+entry:
+  %tobool8 = icmp eq i32 %n, 0
+  br i1 %tobool8, label %while.end, label %while.body.lr.ph
+
+while.body.lr.ph:
+  %0 = sext i32 %n to i64
+  br label %while.body
+
+while.body:
+  %indvars.iv = phi i64 [ %0, %while.body.lr.ph ], [ %indvars.iv.next, %if.end ]
+  %b.addr.011 = phi i32* [ %b, %while.body.lr.ph ], [ %b.addr.1, %if.end ]
+  %d.addr.010 = phi i32* [ %d, %while.body.lr.ph ], [ %incdec.ptr4, %if.end ]
+  %c.addr.09 = phi i32* [ %c, %while.body.lr.ph ], [ %c.addr.1, %if.end ]
+  %indvars.iv.next = add nsw i64 %indvars.iv, -1
+  %arrayidx = getelementptr inbounds float* %f0, i64 %indvars.iv.next
+  %1 = load float* %arrayidx, align 4
+  %arrayidx2 = getelementptr inbounds float* %f1, i64 %indvars.iv.next
+  %2 = load float* %arrayidx2, align 4
+  %cmp = fcmp une float %1, %2
+  br i1 %cmp, label %if.then, label %if.else
+
+if.then:
+  %incdec.ptr = getelementptr inbounds i32* %b.addr.011, i64 1
+  %3 = load i32* %b.addr.011, align 4
+  %add = add nsw i32 %3, 12
+  store i32 %add, i32* %b.addr.011, align 4
+  br label %if.end
+
+if.else:
+  %incdec.ptr3 = getelementptr inbounds i32* %c.addr.09, i64 1
+  %4 = load i32* %c.addr.09, align 4
+  %sub = add nsw i32 %4, -13
+  store i32 %sub, i32* %c.addr.09, align 4
+  br label %if.end
+
+if.end:
+  %c.addr.1 = phi i32* [ %c.addr.09, %if.then ], [ %incdec.ptr3, %if.else ]
+  %b.addr.1 = phi i32* [ %incdec.ptr, %if.then ], [ %b.addr.011, %if.else ]
+  %incdec.ptr4 = getelementptr inbounds i32* %d.addr.010, i64 1
+  store i32 14, i32* %d.addr.010, align 4
+  %5 = trunc i64 %indvars.iv.next to i32
+  %tobool = icmp eq i32 %5, 0
+  br i1 %tobool, label %while.end, label %while.body
+
+while.end:
+  ret void
+}
+